Cesar Millan has a new show and is feeling like a top dog again--but two years ago he had given up on life.

An upcoming Nat Geo Wild documentary reveals that the "Dog Whisperer" star attempted suicide in 2010 following the death of his beloved pit bull, Daddy, and the breakup of his 16-year marriage.

"It was hard, because I wasn't expecting it," he says of the divorce from wife Ilusion, with whom he has two sons. "I went into a big depression. I lost a lot of weight. And I felt that I lost the most important thing, which was my family."

"I think my life has everything, you know, it has comedy has drama has action," Millan says. "I don't know about the ending yet. I'm just glad I can tell the story. Hopefully people get inspired, they get motivated. It doesn't matter where you come from. Really what I would like for people to get out of this is just to not lose hope, no matter what happens. You should never lose hope."

Next up, "Leader of the Pack," which filmed in Spain, premieres on Nat Geo Wild in January.